<%#
Copyright 2013-2020 the original author or authors from the JHipster project.

This file is part of the JHipster project, see https://jhipster.github.io/
for more information.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-%>
package <%= packageName %>.security.oauth2;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import <%= packageName %>.client.TokenRelayRequestInterceptor;
import org.springframework.core.Ordered;

import java.util.Optional;

import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;

public class AuthorizationHeaderFilter extends ZuulFilter {

    private final AuthorizationHeaderUtil headerUtil;

    public AuthorizationHeaderFilter(AuthorizationHeaderUtil headerUtil) {
        this.headerUtil = headerUtil;
    }

    @Override
    public String filterType() {
        return PRE_TYPE;
    }

    @Override
    public int filterOrder() {
        return Ordered.LOWEST_PRECEDENCE;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        Optional<String> authorizationHeader = headerUtil.getAuthorizationHeader();
        authorizationHeader.ifPresent(s -> ctx.addZuulRequestHeader(TokenRelayRequestInterceptor.AUTHORIZATION, s));
        return null;
    }
}
